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| Questão | Responda |
| When combining uncertainty, the units must be..... | The same |
| For uncertainty of A+B or A-B, we should: | Add absolute uncertainties together then recalculate the percentage uncertainty |
| For uncertainty of AxB or A/B, we should: | Add the percentage uncertainty of A to the percentage uncertainty of B |
| For uncertainty of A^2, we should: | Double the percentage uncertainty of A |
| For uncertainty of A^n, we should: | Multiply the percentage uncertainty by n |
| For uncertainty of A x number (not measured) ..... | Percentage uncertainty remains constant |
| For uncertainty of A / number (not measured) ..... | Percentage uncertainty remains constant |
| If we measure the thickness of 100 sheets of paper with +/-1mm uncertainty, dividing this by 100 for the thickness of 1 sheet gives the uncertainty: | 1/100 = +/-0.01mm |
| A circle has the radius 0.14mm. Find : 1. The area 2. The percentage uncertainty 3. the absolute uncertainty | 0.14mm = 1.4x10^-4m. % uncertainty of r: 0.01/0.14 x 100 = 7.1% 1. Area = π(1.4x10^-4)^2 = 6.2x10^-8 m^2 2. % uncertainty in r^2: 7.1 x 2 = 14.2% 3. (6.2x10^-8)x14/100 = 8.69x10^-9 m^2 Therefore area = 6.2x10^-8 m^2 +/- 8.69x10^-9 m^2 |
| How do we calculate the range? | |Biggest - Smallest| |
| When we repeat readings / judgments, the absolute uncertainty can be calculated by..... | Halving the range |
| When calculating the range, we should ignore..... | Anomalous results |
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